Thank you for your professional & very useful plugin. I've been trying it for the last hour and it's very good but I have couple of notes & hope you take it into consideration to be able to depend totally on your plugin:
1- The Integration with WP users: If I want a registered user to submit some information, why to ask him for his name or username? it would be better to get these information from the user profile. In the email sent after each submission, there are:
User full name: -
2- Records: if there's a possibility to show charts or statistics. you know your plugin is very useful for many purposes, like questionnaires too & polls. It would be great to be able to analyze results.
3- Multi Submitting : Is there a possibility to prevent a user from submit a form more than once?
Sorry for taking much of your time but adding those features will make your plugin a comprehensive, multi- purposes plugin :)